针对细长杆件刚性差，易产生弯曲变形，在大尺寸配合中难以保证配合精度的问题，提出采用减少配合面长度，适当增大配合间隙的方法处理间隙配合问题，可降低杆件加工成本，满足配合精度要求。 Aiming at the problem of poor rigidity and easy bending deformation of slender members and difficulty in ensuring the precision of fitting in large size fitting, the method of reducing the mating face length and appropriately increasing the mating clearance is proposed to deal with the problem of clearance fit, which can reduce the processing cost , To meet the requirements with the accuracy.